Re: [9fans] gar nix!

[Noah Evans <noah.evans@gmail.com>]

Submit these changes as code reviews. See /PROCESS if anything is unclear about how to do that.

Sent from my iPad

On Sep 16, 2011, at 3:19 AM, erik quanstrom <quanstro@quanstro.net> wrote:

> well, after a bit of a time resembling /sys/src/cmd/aux/vga/adventure
> i currently have my atom box running nix.  unfortunately, only one
> core is recognized.  but i'll just have to leave one or two things till
> tomorrow.
> 
> here are a list of a few things i tripped on
> 
> 1.  unfortunately, ppxeload isn't ready to load a .gz.  i added a bit of
> code to at least not jump unconditionally to an x86 binary, but that's
> just not enough.  need to revisit this.
> 
> 2.  ppxeload accepts only the old-and-wierd serial baud setting and
> not the kernel-standard, e.g. "0 b115200".  i did fix this.
> 
> 3.  the 8169 driver wasn't working.  i just dropped the one from 9load
> on top.  inelegant, but effective.
> 
> (i did have a 82563 chip going for a while that wasn't recognized.  also
> needed to drop in a new driver for this, but since then the hardware has
> died.)
> 
> 4.  panic on memory init.  this was caused because the only page color was
> 6, thus when starting in the array of page colors at 0, you won't find any.
> .  i worked around this with this bit of code.
> 
> ; diffy -c physalloc.c
> /n/dump/2011/0915/sys/src/nix/k10/physalloc.c:236,242 - physalloc.c:236,244
>      uintmem m;
> 
>      DBG("physalloc\n");
> -    assert(b->size > 0);
> +    if(b->size == 0)
> +        return 0;
> + //    assert(b->size > 0);
> 
>      avail = b->avail;
>      blocks = b->blocks;
> 
> i need to go back and investigate if this is a problem with memory recognition
> or what.
> 
> 5.  needed to update 8169 and 82563 in the kernel.
> 
> 6.  had an old version of 6l that expected to make 4k pages.  by the way,
> (won't we pay a heavy price for forking and/or execing small programs
> with 2mb pages?  this means that each fork/exec is going to be at least
> 6mb worth of messing around.)
> 
> it looks like my processors aren't recognized, and i'm pretty sure that the
> atom supports 1gb pages, but they aren't recognized either.
> 
> - erik
>